简介：TakingtheHuaihetotheNvshanhusegmentoftheTanlu(Tancheng-Lujiang)faultzoneasthemainresearchtargettoexplorewhethertherehasbeennewactivitysincethelateQuaternary,andbasedontheinterpretationofremotesensingimagesandrepeatedsurfaceinvestigations,weexcavatedtrenchesatthesectionswherethetectoniclandformissignificant,identifiedandrecordedthedeformationpatternsofthefaultandanalyzedtheactivitybehavior.Samplesofnewactivityanddeformationwerecollectedandorientedslicesweregroundbasedonthesamples'originalstatetomakethemicrostructuralanalysisanddemonstration.Alloftheaboveresearchshowsveryclearlineartectonicgeomorphologyalongthefault,threetrenchesacrossthefaultzoneallrevealednewdeformationtracessincelateQuaternary.ThelateststratumdislocatedbythefaultisthelateQuaternaryandHolocene.Themainslipmodeisstickslip,asrepresentedtypicallybyfaultscarps,wedgeaccumulation,thefaultsandthefilledcracksandsoon.Ingeneral,itshowsthecharacteristicsofbrittlehigh-speeddeformationandbelongstotheprehistoricearthquakeruins.Theaboveunderstandingwasconfirmedpartiallybymicroscopicanalysis.Inaddition,thesimilaritiesanddifferencesandthepossiblereasonsforthecharacteristicsofthelatestactivitiesoftheTancheng-LujiangfaultzoneinthenorthandsouthoftheHuaiheRiverregionsarealsodiscussedinthispaper.

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